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J. R. SEVVERANGE. i KNOT TYING MBGHANISM FOB, GRAIN BINDBRS.

No. 382,773.- Pmmemmed mmady 1 5, 1888.-

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B. C N A R lE V E S E Jlv u d. o M 0 W KNOKT TYING MBGHANI-SM FORl GRAIN BINDERS.

No. 882,778. Patented May 15, 1888.

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KNoT TYINGMEGHANISM PoR GRAIN BINDERS--r i A,

No. 382,773. A Patented May 15, 188.8'.

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(NuModelm y J. R'. 'SEVVBRANGEJ KNOT TYING MEGHANISM POR GRAlN BINDERS. l No. 382,778.Jr A Pate'ntedvMay '1.5, 1888.

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` J. R. SBVERANCE.

KNOT TYING MEGHANISM FOB GRAIN BINDBRS.'

y APatented May'15j1888.. f

- i Il MEA D j UNITED STATES .IAMEs E. sEvEEANcE, Aor 'EEEMoNr WILLIAM D. BALDWIN, or MoNTcLAIE, AD'sEr, or HoENELLsvILLE, NEW YoEK.

PATENT OFFICE.

OHIO, ASSIGNOR OF '.[lVVO-THIRDS TO NEW JERSEY, AND rJOHN C.

KNOT-TYING MECHANISM FOR GRAIN-BINDERS.

SPECIFICATION forming part of Letters Patent No. 382,773, dared May 15, 1838. v

` Application filed February 20, 1886. Serial No. 192,646. (No model.) v

T all whom, it may concern.-

Be it known that I, JAMES R. SEvE'RANcE, a citizen of the United States, residing at Fre- Inont, in the county of Sand usky, State of Ohio, haveinvented certain new and useful Improvements in Knot-Tying Mechanism for Grain- Binders, of which the following is a description.

The present invention relates to knot-tyingl Io devices for self-binding harvesters; and it consists in improvements in the design, construction, and operation of the double-spiral knotter shown and described in Letters Patent No. 237,135, granted to me February 1, 1881,

I 5 as will be hereinafter fully set forth in detail,

and also in a novel construction of the cordholder. p n

The object of my improvements herein described is, mainly, to contract the space occupied by the knotting machinery and adapt it for use in my new grain-binding harvester, in which the binder is placed inside of and close to the drive-wheel and the bundle is delivered by my vertically-vibrating forked discharger.

A further object is to simplify the Yknotting device, especially by providing a simplel rotary cord-holder adapted to work in combination with a spiral knotter of the type here shown and to perform all the offices of the 3o cord-holder and cord-controller of my former patent by one forward rotation for each knot.

Afurtherobject is to improve, generally, the construction and operation ofthe knotting device, allas hereinafter described and 3 5 claimed.

In the accompanying drawings, Figure 1 is a plan View showing the knotter and that portion of the binder-frame upon which it is supported. Fig. 2 is an elevation of the devices 4o shown in Fig. 1. Fig. 3 is-an elevation of the same from the opposite side. Fig. 4 is an end View of the knotting devices, showing the casing in section, on `the line 4 4 of Figs. 2 and 3.

Fig. 5 is a plan view of the knetterand its 4 5 actuating mechanism with the casing removed. Fig. 6 is a plan view, partly in section, of the cam and gear wheels for actuating the knotter, mounted upon a portion of the main bindershaft. Fig. 7 is an end view of the pinion and mutilated gear wheelsl for impartingalter- 5o mately-reverse motion to the spiral cord-looping device. Figs. 8, 9, 10, and 11 are enlarged details of the cord holding and guiding devices.V Fig. 12 is an elevation, partly in section, giving a detail View of the rotating doublespiral cord-looping device andj its actuatingcam, t-he cord-holding jaws at the extremity of the spiralbeing-open and the spiral in its retracted kposition of rest. Fig. 13 is an endview thereof. Fig. 14 is a side elevation vof 6o the knotterispirals and a portion of the cam, taken on `the side opposite to that shown in Fig-12. It shows the fixed block by which the spiral is caused to screw or move back and forth when rotated and the spiral in its y most advanced position,wi,th the jaws opened for the reception of the cord. Fig. 15 is asecf tion on the lines 15 15 of Fig.`14, a portion of the outer casing beingshown in addition. Fig.

16 is a view in detail of one member of the 7o double spiral and its hollow shank. Fig. 17v

is a similar view of the other member of the spiral, with its hollow shank and the supporting-shaft, the shank being shown partly in section. Fig. 18 is a longitudinal sectional ele- 7 5 vation showing the relative positions of the spirals with respect Ato each other and their supporting and actuating mechanism. Figs.

19 and 20 are detail views of the shorter spiral, and Figs. 21 and 22 are details of Kthe longer So spiral to show the manner of connecting them to their tubular Shanks. Fig. 23 is-a diagrammatic view of the shell-cam by which the spiral is actuated, showing the tracks therein and the progressive positions of the anti-friction rollers upon the stud extending from the `Shanks ofthe spiral looper by which the twoportions thereof are controlled. Figs. 24E to 3l are diagrammatic views showing the progressive positions assumed by the parts immediately in- 9o volved during the several movements incident to the formation of a` knot, a'moredetailed reference to which will be made in the description of the operation of the deyice. Fig. 32

is anenlarged front elevation showing the cordholder and a portion of the knotter-spiralsv in the same position as in the plan view, Fig. 27. i Fig. 33 is an enlarged plan view of. the cordholder and a portion of the knetter-spirals in the same position as in the side elevation, Fig. 29. Fig. 34 is an enlarged front elevation of the holder in the same position as in the side elevation, Figs. 3l and 24.

Similar letters denote like parts throughout. The casing A, within which the knotting mechanism is contained and supported, is secured to the frame-work B B' of the binder in any convenient manner, the power necessary to produce its various movements being supplied through the binder-shaft A', which, by means of intervening connections, produces one operation of the knot-tying devices each time said shaft is revolved, which, by means of appropriate mechanism, is caused to occur whenever sufficient grain has accumulated to form a bundle of the desired size. Upon this shaft is mounted a driving wheel or disk, a, which is formed with gear-teeth B21 on a por tion of its periphery, the remainder of the pel riphery being plain and smooth, as at A2. The first tooth ofthe series has an extension, b, on its inner side in the nature of a tappet, and a camtrack, b', is formed between two ribs on the face of the disk. Two other disks, B2 '133, are likewise fixed to the driving-shaft and provided with segmental beveled gearracks the teeth of which alternately mesh with the teeth of a bevel-pinion, B2 lying between them and rotate it first in one direction and then in another. This pinion is provided with delayshoes A3, which bear against flanges b2 1f on the disks andkeepit from turning until driven positively in one direction and then in another by the gear-teeth thereon.

The rear end of the knotter-casing is supported by a bracket, B5, provided with a journal, a', within which rotates a shaft, a2, carrying at one end the beveled pinion B* just described, and at the other a somewhat larger one, a3, which latter meshes with a pinion, a", mounted upon the fixed axis a5. This axis is suitably supported at its rear end by a bracket depending from the casing A, and at its forward end by a depending bracket, e, secured to or extending from the side of the casing and formed with the cordguiding projection or deflector e' and groove e2, hereinafter referred to. The pinion a4 is secured to the rear end of a she1lcam, C, to which intermittent rotary motion is imparted in alternating directions by the mechanism just described.

The knot-forming devices consist principally of the two parallel spiral arms D E, which in many respects are similar to those shown and described in my patent,No. 237,135, but differ therefrom in various particulars. In the presentinstance',instead of being hook ed and grooved merely, the forward spiral, D, has an abrupt end, in which is formed a recess or groove that is parallel, or nearly so, with the axis of the spiral, and the spiral at its end is made. somewhat wider than at other points, so as to form two points, 19', between which a projecting rib, p2, extending from the front side of the'other spiral is guided. The spiral E, in addition to the rib p2, is formed with a hook, E', that fits into the recess D', between which and the side walls of said recess the cord is firmly held during the formation of a knot.

The spiral arms D E are of unequal length and are secured upon hollow shanks fitting one within the other, thetwo together being mounted upon the fixed axis a5. The shorter spiral, E, carries the hookI 'and is secured to the inner shank, El. The longer spiral, D, which is the forward or outer one, is provided with the recess at its extremity and secured to the exterior of the lshank D2, its convolutions extending the entire length thereof.

The shank El is somewhat longer than the shank D2, Within which it lies, and it is provided at its rear end with a collar, F', upon which is placed a suitable stud and anti-friction roller, f a second pin and roller, f, be.- ing provided at or near the rear extremity of Vthe shank D. A coiled spring, D3, is secured to and connects the rear end of the shank Dz to the collar F', and operates to force the members of the spiral in opposing directions, thereby holding the hook E tightly in therecess D'.

Instead of extending rearward and increasing the length of the knotter, as in my previous patent before referred to, the shell-cam C projects forward and envelops the hollow Shanks and the rear portions ofthelong spiral.

The cam C is formed with two tracks, .G and G', eut longitudinally in its walls nearly on opposite sides thereof. The roller f, attached to the shank D2, traveling in the track G, bears against the straight edge thereof in the position l 2 in Fig. 23. The roller f,actuating the shank E2, travels on the track G'. The spiral D is formed with a stop, d, which is in the path of a projection, d', that forms or may form a part of the fixed block D, the edges of which are of the same pitch as the spiral, and, being inserted between the convolutions thereof and suitably secured to the casing,eompels it to move longitudinally along its axis a5 in accordance with the direction of its rotation. Vhen the cam is rotated in its first direction and the spiralis projected to its farthest position,the shoulder d contacts with the block d and stops the further rotation or movement oft-he member D. The rollerf being now in position 4,continued rotation ofthe cam will complete the movement of the spiral E and project the hook E' forward and out of the recess D', thus opening the jaws for the reception of the cord. Then the movement of the cam is reversed,the jaws are first closed on the cord and then the spiral travels backward as a unit, and the cord being held in the cord-hook or clamping-jaws D' E' by the force of the spring D3 until the rollers approach their final position, when, by continued rotation of the cam the rollerf' is forced up the inclined portion g of its track, reducing the speed of the hooked spiral E, while the roller f, lying against the straight side of the cam G,

of my former patent, No. 237,135, that the' solid inner knottershank,M, must attimes in the operation of the knotter extend back outside of the bearing by a distance equal to the extent of thelongitudinal motion of the knotter. It will also be seen that the knotter-shafts are mounted in two bearings, .mm', each of which must belong enough to present adequate Wearingsurface; fand, further, the knotter-cam shell has two bearings upon the Shanks of the knotter-spirals. By the improvement herein shown, in which the inner knotter-shank isv made tubular and is mounted ona fixed axis, the backward extension of the shaft M is avoided; also, one of the bearings, m, is dis-4 pensed with and the other, m', is shortened, since wearing-surface is not required, and by making the cam-shell a nearly complete cy1- inder and resting the front end of it upon one of the spiralsthe front bearing of the camshell can be omitted. This makes a very importantand material reduction in the length of the knetter-shafts and their casing-an essential point in any favorableadaptation of this form of knotter for use in a low harvesterbinder of the type above named. Again, inspection of Fig. 10 of my former patent shows the guide-block N arranged to act upon the free part of the spirals. By carrying one of the spirals back on the outside of its tubular shank a much firmer screw-threadis presented to be acted upon by the guide-block, (marked D4 in the present casa) and by allowing this spiral threaded shank tobe enveloped bythe kcam-shell this firmerconstruction is secured at the same time with the more compact form above explained. v

At the front portion of the knotter-casing is formed a longitudinal slot, H, for the reception of the needle-arm and the passage of the cord, theside next to the cord-holder being formed with a depending curved lip, h, Fig. 4, which serves as a guard for the point of the cord-holder and the knife.

My improved cord-holder consists of a fixed cylindrical segment, h2, Figs. 8, 9, and 11, supported from the kuot'ter-casing, around which segment rotates the curved clamping-plate K,

provided with the projecting spiral horn K, adapted to hook over and engage the cord and draw it into position to be caught and clamped between the plate and the fixed segment.

The construction of the device is as follows: In the side of the casing A is mounted a stud, h, which is formed wit-ha head, H', fromV one side of which extends a segmental Hange, h2.A

rIhe flange h2 is lpreferably beveled or sloped along its outer end, as. at h4, for.the-.purpose of affording increased space for. the-passage of the cord along the inner surface of the spiral cord-hook K toward the angle k, and the segmental ange h2 is formed with the recess vo'r groove/h3 along its inner edge, for the purpose ofA preventing the accumulation between the flange and clamping-plate of pieces of cord' or other substances which would'clog and impede the operation of the device. The recess h3 is formed by turning down the surface of the hub H to a diameter smaller than thatof the segmental clamping-surface h2. .One edge of the hub may be beveled off or cut away to afford greater space for the action of the vi-y brating knife.. Apinion, I, rotates upon the stud h and carries a spiral cord guiding horn, K, which terminates in a curved plate, vK', which latter extends to and is secured upon the hub of the pinion I, which, when rotated, carries it past and in close proxim ity to the circumference of the flange h2, forming between the inner surface of the plate K and the circumference of the Iiange hl a cord-holder which operates to hold the cord Whether the clamping-plate is4 moving or stationary. An obtuse rounded angle is formedy at the junction of the horn K with the plate K,

asindicated at 7c, Figs. 10 and 33. The pinion I is driven by the wheel or disk a on the bindershaft, and is provided with the gearteeth t', meshing with the teeth'B21 on' the periphery of the wheel a. |Ihe pinion is mutilated by the omission of two of its teeth, leaving a space, i2, which embraces the smooth portion of the periphery of the disk a during the period of non-rotation of the pinion and locks it against accidental rotation. A side ICO spur, L, extends from the .hub of the pinion.

in'a position directly in line with the point from which one of the teeth has been omitted,

and the tappet b at the commencement of the segmental rack B21 contacts with it, and in so doing rolls the teeth of the pinion into mesh with the teeth B21, by which the said pinion together with the horn and cord-holder are'then rotated through a complete revolution.

A A knife, L', is mounted upon a bracket, l,` secured to the inner side of the casing A, and is so formed and adjusted that it may 'nove into the space within the convolutions of the horn K when the latter is at or near its first and last positions, and thereby sever the vcord close to the clamp and release'the bundle. The knifearm extends rearwardly and is provided with a proiecting roller, L2,which"travels in the'cam-track b on the face of the diskj al and actuates the knife, as will be readily understood.

The operation of the device will now be described, beginning with the parts in their first positions, which are substantial] y those shown in Fig. 24, in which it willbe seen thatthe end of the cord M is clamped between the plate K andthe flange h2. This cord then extends across Athe horn K, (the point of .which is at this time under theedge'of the lip h,) and then diagonally upward and out through the rear portion of the slot H and around the bundle to be bound, and back by way of N, which is the new cord-just brought in by the needle-arm O, and thereby laid across the cord M and in the groove e2. rIhe spiral looper is at this moment in its extreme rearward position of rest, the ends being separated or the jaws opened, as when the loop of the previous knot was released. NV ith the parts in these positions and the gavel ready to be bound, the operation of the tying begins by rotation ofthe pinion B4, which imparts movement to the cam C, and through it to the spiral looper, forcing it to its extreme forward position and holding it there for a moment with the jaws of the cord-hook D E open. As the spiral looper approaches the extremity of its forward movement, the cord-holder is rotated by the engagement of the segmental rack B21 en the driving-wheel a with the teeth of the pinion I, the resultant positions being indicated by Figs. 26 and 27, and the cord, which was sta tionary up to this time, is now by the movement of the holder carried around the circumference of the flange h2 and placed between the separated ends ef the double spiral, and then released by the continued rotary move` ment of the cord-helder mechanism, which carries it oi the ixed segment. Just before the cord is entirely released, however, the jaws D E are closed upon the cord by the spring D3. The movements of .the parts are so timed that thejaws open as the pinion B, by which the spiral was driven in its forward motion, runs off the rack that drove it and then onto the opposing one, and it is during the pause involved in this change of motion of the spiral that the cord is placed inthe open jaws D E at the ends of the spirals by the rotating cord-holder prior to the beginning ofthe reverse movement of the spiral, coincident with which thc continued rotation of the cord-holder entirely releases'the end of the cord, the bight of which is then carried by the retreating spiral partly through the loop previously formed thereon, as shown in Fig. 29. As the knot is being finished, the centinued rotation of the pinion I and the movement of the horn K carries the cord P gradually toward the starting-point until itis caught in the angle 7c and clamped between the plate K and the iiange h2, at which moment the knife L is thrown forward and severs the cord between the knetter and the holder. The strain upon the cord, due to the elasticity er expansion of the bundle, is new thrown entirely upon the bightstill held by the knetterjaws,whieh in their further retreat draw the loop against the bracket e and in position to facilitate its disengagement from them-the instant they open at the termination ofthe -retrograde movement and leave the bound bundle free for removal. The cord P, held by the holder and extending te the binder-arm, is then ready to be moved into the position shown at M in Fig. 24 by the next bundle, when by the actuation of the binder-shaft and the descent of the needle-arm the operation of tying is repeated. The cord-helder revolves in one direction only-viz., with the point of the horn K in advance (see arrows in Figs. 32, 33, and 34)-and makes one revolution to each knot. The beginning of its revolution carries the point of the horn K forward and downward from its position close under the edge of the casing. It is thus placed favorably fer engaging and retaining the cord P, which is laid under it by the retraction of thc binder arm. (See Figs. 26, 27, 28, and 32.) Thus far the horn K takes the place ofthe cordcentroller p2 of my former patent, No. 237,135. The cord P, stretched from the knetter to the retracted binder-arm, passes outside of the orbit ofthe elampingplate K', Figs. 27 and 32. The spiral horn K, engaging the cord outside of the orbit of the clamping-plate, by its continued rotation nieves the cord laterally inte said orbit, Fig. 33, so that the completed rotation of the cord-holder causes the cord to be clamped between the plate K and the cylindrical segment h2, Fig. 34. The plate K (as here shown made of spring-steel) is so mounted upon th'e hub of the pinion Ithat when opposite the segment h2 it shall press the cord upon the segment with a strong elastic or yielding pressure, thus being adapted te hold firmly cords of varying size. Further security is given to the grip by arranging so that when the cord is being wrapped about the bundle and the severest strain comes upon the grip of the 'cordholder the cord draws around the base of the horn in such direction (see cord marked M, Fig. 24) as to pull the plate K toward the segment h2. Thus increase o f strain on the cord is made to increase the pressure on the end of the cord held between the plate K and the segment h'l. The cord-helder is therefore self-adjusting in the strength of its grip at the time of greatest strain on the cord.

Various modifications of the hereinbefere described devices will be apparent to one skilledin the construction of such apparatus, and I therefore de not wish to be understood as limiting myself` to the exact details shown and described, and I may in practice substitute other and well-known mechanical equivalents for some of the elements described and claimed.

The groove e2 in the bracket e is not essential to the practical operation of my improved knetter.

Having thusdescribed my invention,what I claim is 1. In a knetter, the combination of two parallel spiral arms of unequal length independently mounted upon tubular shanks fitting one within the other and supported on a fixed axis, the longer spiral being extended as a screwthread upon the exterior of the outer shank, and a stationary block acting against said portien of the longer spiral, whereby the spirals whenrotated are' caused to Ymove longitudinally upon their axis, substantially as and for the purposes set forth. i

2. Ina knetter, the combination of a pair of parallel spirals supported upon independent tubular shanks,one within the other, mounted loosely upon a fixed axis, and suitable mechanism adapted togive them a reciprocating longitudinal and rotary motion, substantially as described. A

3. In a knetter, the combination of two parallel spirals of unequal length, each attached spring connecting the rear ends ofthe shanksA and acting tov hold the hookinto the` cord-hold ing recess, a fixed axis upon whichthe inner tubular shank Lis loosely mounted, means for positively rotating the inner shank, astation-l ary block acting against the convolutions of `one of the spirals for imparting ,longitudinal 'motion thereto, ,a stud or projectionon the exterior shank, and a fixed stop adapted to en-` gage the stud and arrest the movement of the outer shank while the other shank completes its movement and opens the cord-holding j aws,-

substantially as and for the purposes described.

5. In a knetter, the combination of two parallel spirals, their concentric tubular springconnected shanks loosely mounted on a xed axis, the screw-thread extension of one of the spirals upon the surface of the exterior shank, the cam shell partially enveloping the extended spiral, the stationary blockl adapted to act against said extension, and means for imparting to the camshellareciprocating rotary motion, substantially as and for the purposes described.. f v

6. Ina knetter, the combination of a spiral cord-looping device mounted loosely upon a fixed shaft by means of a tubular shank, a screw-thread upon the surface of thev shank havingv the same pitch as the spiral, a stationary block adapted to act against the spiral to cause it to move longitudinally when rotated, and means for giving to the shank reciprocating rotary motion, substantially as and for the purpose described.

7. In a knetter, the combination of a spiral cord-looping device, a suitable rotary cordholder, and means for imparting a reci procating longitudinal and rotary motion l to the cord-looping device and an intermittent rotary motion in one direction to the cord-holder, all suitably arranged and adapted to cooperate with each other in the formation of a fish-net knot, substantially as and for the pur pose set fort-h.

8., In .a cord-holder, the combination ofa fixed segmental clamping-surface, a revolving clamping-plate so mounted concentrically with the segment as on its rotation to pass close tothe surface of the segment and press thecord against it with ayielding pressure, anda horn projecting spirally outward from the plate and adapted to 4hook over and engage thel needle end of thecord at the beginning ofthe revolution of the plate, and by its continued revolution in the samedirectlon to conduct the cord into position 4to be'caughtand `clamped betions of presentingy the cord to the v knetter and releasing, engaging, guiding, and clamping it, as described, the mutilated pinion, upon the hub of which the vhorn-bearing plate is mounted so as to revolve about the axis of the segment, and the segmental gear fixed upon the binder-shaft and adapted to give tothe vpinion a single rotation at each` revolutionof the `binder-shaft, substantially as described. -10. In a cord-holder, the combination of a Xfixed segmental clamping-surface, its-supporting-post, a pinion mounted to revolve thereon, the'plate K', secured to the pinion and extending across the periphery of the segment, and provided with a spirally extending horn adaptedv on the rotation of the pinion toene gage the cord outside of the orbit of the plate and move it laterally into the orbit ofthe plate, between wvhichwand the segment it is clamped bythe continued rotation ofthe pinion, substantially as described,

, 11.- In a knetter adapted for the formation.

eta fish-net knot, the combination ofthe double spiral, constructed as described,` the cam for actuating the same, the pinions and IIO driving-wheels for imparting rotary motion thereto, the rotating cord-holder, its drivingwhe'el mounted on the binder-shaft, and the vibrating knife, also actuated thereby, substantially as and for the purpose described.

12. In a knetter, the combination, ywith suitable supporting frame-work, ofthe casing casing and supported at its forward end by a depending bracket, and the double-spiral cordlooper mounted loosely upon said axisby its 1A, the axis a5, securedat its rear end tosaid tubular shank, substantially as and for the Y purpose described. n v

13. In a knetter, the cord-holder consisting,

essentially, of the segmental circular clamp-v ingsurface h2 and the intermittently-rotating pinionI, to the hub of which is attached. the

cylindrical clamping-plate K, providedwith the spiral projecting horn K, substantially as described.v f

14. The combination, with the segmental i circular clamping-surface h2, of the revolving elastic clamping-plate K and the spiral projecting horn K, formed in one piece with the clamping-plate, substantially as described.

15. rlhe combination, with the cord-looping jaws, of the cord-holder consisting of a rotating spiral horn and a fixed segment against which the cord is clamped by the projecting base or heel of the horn, continued rotation of which carries the cord into the open loopingjaws as it passes off the segment and is released by the holder7 substantially as described.

16. The combination, with the knotter-casing formed with the lip or guard h, ofthe rotating cord-holder having the spiral cordguiding horn K, adapted to pause beneath and be protected or shielded by the lower edge of the said lip, substantially as shown and described.

17. The combination, with the stud h, hub H', having recess ha, and the circular segmental clamping-surface h2, of the pinion I, having clamping-plate K', provided with spiral projecting horn K attached thereto, substantially as and for the purposes set forth.

18. The combination, with the knottercasing formed with the lip or guard h, of a vibrating knife and a bracket attached to the casing and adapted to support said knife,with its blade behind and protected by the lip h', substantially as shown and described.

19. rlhe combination of the knetter-casing formed with a lip or guard, h, with the rotating cord-holder having the spiral cord-guiding horn K, adapted to rest behind and be protected by the lip h, and the vibrating knife mounted as described and located behind the guard and adapted to move during its cuttingstroke between the convolution of the spiral horn, as shown and described.

20. The combination ofa knotter and a cordholder consisting of a fixed segment and a. rotating plate provided with an extending spiral cordguiding horn, with a vibrating knife mounted as described and adapted to move during its cutting-stroke between the convolutions of the spiral horn, as set forth.

21. In combination with the cord-looping devices of aknot-tyer, a cordholder consisting, essentially, of a circular segmental clampingsurface and a revolving clamping-plate provided with a spiral projecting horn or cordhook arranged to revolve about an axis at or nearly at right angles with the plane of the vibration of the binder-arm, whereby the engagement of the cord by the rotation of the hook is secured, substantially as and for the purposes set forth.

22. The combination, in a cord-holder, of the cylindrical segmental clamping-surface h2, having its outer edge beveled, as at h, and the revolving clamping-plate K', provided with spiral projecting cord-hook K, substantially' as described.

In testimony whereof I hereto affix my sig-- nature in presence of two witnesses.

JAMES R. SEVERANCE.

Witnesses:

H. S. BUCKLAND, JAMES H. FowLnu. 

